42mm Iris for Jaggi Nova glasses

Pistol shooters, and on rare occasions rifle shooters as well, find it beneficial to sight through a small iris. Doing so increases your apparent depth of field. Just like a camera aperture, the smaller opening makes everything appear sharper... and when you are looking at the front sight and you want the bull to be sharp at the same time, sharper is a good thing!
This aperture/iris fits Jaggi Nova frames, specifically the 42mm lens holder. Made for the right hand lens holder.